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首页> 外文期刊>RSC Advances >Synthesis and evaluation of eco-friendly carboxymethyl cellulose/polyvinyl alcohol/CuO bionanocomposites and their use in coating processed cheese
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Synthesis and evaluation of eco-friendly carboxymethyl cellulose/polyvinyl alcohol/CuO bionanocomposites and their use in coating processed cheese

机译：环保型羧甲基纤维素/聚乙烯醇/ CUO脱硫复合材料的合成与评价及其在涂层加工奶酪中的应用

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In the present study, we formulated and characterized CMC/PVA/CuO bionanocomposites to evaluate their use in coating processed cheese. Copper oxide nanoparticles (CuO-NPs) were prepared and added to a mixed solution of carboxymethyl cellulose (CMC)/polyvinyl alcohol (PVA) using compositions of 0.3, 0.6 and 0.9% (w/v). The CMC/PVA/CuO bionanocomposites were prepared by a solution casting method and used for coating processed cheese. The fabricated bionanocomposite films and CuO-NPs were characterized by TEM, SEM, EDEX, XRD, DLS, and FT-IR analysis. Inclusion of CuO-NPs decreased the gas transmission rate (GTR) and water vapor transmission rate (WVTR) of the prepared film. Also, the bionanocomposite suspensions exhibited high but variable inhibitory effects against several pathogenic bacteria and fungi. The impact of coating of processed cheese surfaces with the prepared bionanocomposite films on microbiological, physicochemical, textural and sensory properties of the processed cheese were assessed during 6 months of cold storage. Coating cheese with film containing CuO-NPs eliminated mould growth on the cheese surface and decreased significantly ( P < 0.05) the total bacterial count of the cheese. Furthermore, coating of cheese decreased the moisture losses and retarded the increase in the cheese hardness during storage. The highest acceptability at the end of the storage period was given for processed cheese coated with the bionanocomposite containing 0.9% CuO-NPs. Thus, the obtained CMC/PVA/CuO bionanocomposite films could be a promising candidate for cheese packaging applications.
机译：在本研究中，我们配制和表征CMC / PVA / CUO BionAnoC复合材料，以评估其在涂层加工奶酪中的用途。使用0.3,0.6和0.9％（W / V）的组合物制备氧化铜纳米颗粒（CuO-NPS）并加入到羧甲基纤维素（CMC）/聚乙烯醇（PVA）的混合溶液中。通过溶液浇铸方法制备CMC / PVA / CUO脱硫复合材料，用于涂覆加工的奶酪。通过TEM，SEM，EDEX，XRD，DLS和FT-IR分析表征制造的脱硫复合膜和CuO-NPS。包含CuO-NPS降低制备薄膜的气体传输速率（GTR）和水蒸气透射率（WVTR）。此外，脱硫复合悬浮液对几种病原细菌和真菌具有高但可变的抑制作用。在6个月的冷储存期间评估加工乳酪涂料与制备的胆汁复合薄膜对加工乳酪的微生物，物理化学，纹理和感官特性进行影响。涂料奶酪含有CuO-NPS的薄膜，消除了奶酪表面上的模具生长并显着下降（P <0.05）奶酪的总细菌数。此外，奶酪涂层降低了水分损失，并在储存过程中延迟了奶酪硬度的增加。储存时段结束时的最高可接受性用于涂有含有0.9％CuO-NPS的二硫灭菌复合材料的加工乳酪。因此，所获得的CMC / PVA / CUO脱硫膜可成为奶酪包装应用的有希望的候选者。

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